As per the usage part, it shows as follows.
You just #include "tlse.c" in your code. Everything is a single file.
However by including the tlse.c, compiler gives 161 errors.
Error (active) E0337 linkage specification is incompatible with previous "crypt_argchk" (declared at line 12953 of "libtomcrypt.c")
libtomcrypt.c 17022